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EP3400753B1 - Vitrage chauffable - Google Patents

Vitrage chauffable Download PDF

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Publication number
EP3400753B1
EP3400753B1 EP16810419.8A EP16810419A EP3400753B1 EP 3400753 B1 EP3400753 B1 EP 3400753B1 EP 16810419 A EP16810419 A EP 16810419A EP 3400753 B1 EP3400753 B1 EP 3400753B1
Authority
EP
European Patent Office
Prior art keywords
voltage
heatable
glazing
pane
anyone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16810419.8A
Other languages
German (de)
English (en)
Other versions
EP3400753A1 (fr
Inventor
Ophélie BARUZIER
Renaud HUBERT
Pierre DEFOY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Glass Europe SA
Original Assignee
AGC Glass Europe SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AGC Glass Europe SA filed Critical AGC Glass Europe SA
Publication of EP3400753A1 publication Critical patent/EP3400753A1/fr
Application granted granted Critical
Publication of EP3400753B1 publication Critical patent/EP3400753B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/023—Cleaning windscreens, windows or optical devices including defroster or demisting means
    • B60S1/026—Cleaning windscreens, windows or optical devices including defroster or demisting means using electrical means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0014—Devices wherein the heating current flows through particular resistances
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/011—Heaters using laterally extending conductive material as connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/031—Heaters specially adapted for heating the windscreen wiper area
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/035—Electrical circuits used in resistive heating apparatus

Definitions

  • the present invention relates to heatable glazings and in particular to heatable glazings having a portion in need of rapid heating.
  • Glazings which are heated by the passage of electric current through a resistive heating element disposed on the window are often provided for the purpose of restoring or maintaining vision through the window where vision has been, or may be, reduced by condensation, frost, ice or snow.
  • Terms such as “demisting”, “defogging” or “deicing” are often used to describe the action of the heating element, and such windows have found particular application in vehicles, especially road vehicles, although their use is not limited thereto. Applications also exist in the doors of freezer display cabinets, and in windows for ships, trains and aircraft, for example.
  • the area of the window heated by the heating element needs to cover the area through which it is desired to restore or maintain vision (the “vision area”).
  • Resistive heating elements are also used to provide a heated area where a window wiper may rest when not in use, to prevent the wiper freezing to the window in cold conditions.
  • Such an area is generally termed a heater wiper rest area (or a heated wiper parking area), and it may add to the area heated for reasons of maintaining vision; alternatively a heated wiper rest area may be provided on its own in which case the heated area is smaller.
  • the resistive heating element may comprise a thin transparent electrically conductive layer (such as a coating) on the window, or it may comprise an array of fine electrical conductors which extend across the window.
  • the conductors may be fine wires, or alternatively lines printed in an electrically conductive ink. Electrical connection to the heating element is normally made by wider conductors known as busbars, which are adapted to carry substantial currents.
  • an electrically heated window may comprise a heating element and a pair of spaced opposed busbars, normally one on each of two opposed sides of a face of the window, with the heating element extending between them over the vision area.
  • Electrical connection to an external power source for example the power supply from the vehicle, may be made by plug and socket connectors of known type, the plug part of which is generally soldered or otherwise adhered to the busbar.
  • EP-A-0876 083 relates to a heated window where the heating element(s) and associated connections of electrically heated windows are configured so as to leave a selected area of the window free, e.g. for the provision of an additional item of equipment, while still providing a window that is acceptable both aesthetically and technically. This is achieved by using busbar portions of different widths in appropriate combinations.
  • More complicated circuits comprising a number of resistive heating elements.
  • U.S. Pat. No. 5,182,431 discloses an electrically heated window having at least three heating elements, at least one of which may be heated faster and to a higher temperature than the others. The various heating elements are connected in series by busbars.
  • U.S. Pat. No. 4,513,196 discloses a heatable windshield which has one heatable zone which can be heated faster than another. Another heatable glazing according to the prior art is disclosed in US 2012/199569 .
  • the present invention accordingly provides a heatable glazing comprising a pane of glazing material with a first portion delimited by a first and a second busbars wherein a voltage V1 is applied and a second portion of the pane in need of rapid heating delimited by the second busbar and a third busbar wherein a voltage V2 is applied.
  • the voltage V1 is converted into a voltage V2 within the second portion of the heatable glazing by an electrical converter DC/DC.
  • the electrical converter DC/DC allows to convert a DC voltage with a particular value to another DC voltage.
  • the electrical converter DC/DC is used to convert a DC voltage with a particular value to another smaller value of DC voltage
  • the electrical converter DC/DC to convert a DC voltage with a particular value to another DC voltage is disposed in a second portion of the pane in need of rapid heating.
  • the second portion may be, in general, any area of the pane. In vehicles (especially road vehicles such as cars) the second portion is, advantageously, the wiper rest area.
  • the present invention proposes a glazing with different heatable zones.
  • the glazing comprises at least a pair of busbars and a further busbar.
  • busbars will be disposed on the pane, preferably on the same side of the pane.
  • first and second portions of an heatable glazing are delimited by busbars.
  • the first portion of the heatable glazing also called the "vision area" is delimited by a first and a second busbars generally elongating and extending across the pane and the second portion is delimited by the second busbar and a third busbar.
  • the first and the second busbars are separated by a distance d1 and the second and the third busbars are separated by a distance d2.
  • the second portion may be in the lower (i.e. when installed) portion of the pane.
  • the first and the second portions may be heated independently by using the power available from the vehicle.
  • the second portion preferentially the wiper rest area may be heated first and then the first portion may be heated.
  • the first portion may be heated before the second zone is heated.
  • the first and second portions may be heated at the same time.
  • the electrical converter DC/DC to convert a DC voltage with a particular value to another DC voltage, preferably with a smaller value is disposed onto (behind) the lower portion of the pane in the wiper rest area .
  • the electrical converter DC/DC to convert a DC voltage with a particular value to another DC voltage preferably with a smaller value with a high efficiency.
  • the electrical converter DC/DC according to the invention to convert a DC voltage with a particular value to another DC voltage preferably with a smaller value is a buck converter which is a simple way to reduce the voltage of a DC supply.
  • a voltage V1 is applied on the first portion of the glazing and a voltage V2 may be applied on the second portion from a voltage applied into the glazing panel.
  • the electrical converter is disposed into the second portion in order to use the power available from the vehicle and applied into the heatable glazing, to reach the required voltage into the second portion.
  • a voltage higher than 10V (volts) is applied to the glazing and according to the invention, the electrical converter DC/DC allows to convert this high voltage value V1 to a smaller voltage value V2.
  • a voltage higher than 10V may be applied into the first portion and a smaller voltage may be applied into the second portion.
  • the higher value is dependent of the choice of voltage done by car's manufacturers.
  • first and second portion of the glazing may be controlled independently.
  • the lower portion of the pane in the wiper rest area may be heated first and then faster than the larger first zone to lead to an efficient heating of the rest area when needed.
  • the smaller voltage value V2 applied to the second portion is smaller than 5V.
  • ⁇ is an amplification factor that allows to inject more power to the second portion opposite to the first portion. The amplification factor is chosen to avoid any damage of the second portion. By this way the second portion may defrost faster than the first portion
  • V1 and V2 may be determined by the power available from the power supply provided by the vehicle and the heating rate and temperature required.
  • the busbar will generally have a resistance of less than 0.03 ⁇ /m, preferably less than 0.025 ⁇ /m and most preferably less than 0.0213 ⁇ /m. If made of copper strip, this would mean that the low resistance busbar would generally have a width of approximately 6 to 10 mm, preferably, 7 to 9 mm and most preferably about 8 mm (depth would be preferably between 50 and 200 microns, preferably 70 to 150 microns and length preferably between 50 and 100 cm and more preferably between 50 and 150 cm).
  • the busbar comprises a metallic strip, preferably a copper strip.
  • the electrical converter DC/DC and the busbars may be electrically connectable to a resistive heating element for heating the glazing.
  • Independent connectability is advantageous because it allows the heating of the portion of the glazing in which the converter is disposed (when the high resistance busbar is connected). When the busbars are connected it allows heating of the other portion of the pane over which the resistive heating element extends.
  • the glazing comprises a resistive heating element
  • this comprises an array of fine electrical conductors extending across the pane.
  • the conductors may be lines printed in a conductive ink (such as a silver-containing frit) which is fired onto the glass surface, or they may be thin wires, e.g. of tungsten.
  • a conductive ink such as a silver-containing frit
  • printed lines in conductive ink are preferred for a glazing comprising a pane wholly of tempered glass.
  • Thin wires and particularly tungsten wires are usually more preferred where the pane comprises a laminate, since the wires may be positioned between two of the plies making up the laminate, and thereby fixed in position.
  • the wires do not need to be cut into two parts: vision area and the wiper rest area.
  • the second busbar is directly applied by contact to the existing resistive heating element to delimited the second portion.
  • first and the second portions may be activated independently and therefore at different frequencies and durations and this according to the actual needs in defrosting.
  • the conductors may extend over the pane from side to side or they may extend from top to bottom, whichever suits the shape of the pane better.
  • the thickness of the conductors may be varied to alter their resistance. For instance, if printed, the conductors may be printed in different widths, typically in the range from 0.4 mm to 1.0 mm. Where the conductors are wires, different thicknesses of wire may be used, typically in the range of 15 to 50 microns. However, the thickness may be higher as when copper wires are used (100 to 300 microns). Conductor resistance may be varied to preferentially heat certain areas of the window, or to balance the combined resistance of different groups of unequal numbers of conductors to produce a more uniform heating effect.
  • the resistive heating element will usually have at least one additional busbar at the side of the element distant from the electrical converter and busbars.
  • The, or each, busbar may be printed in conductive ink, which is preferred if the conductors are formed in the same way.
  • the busbars may be printed in conductive ink or formed from metal strip, e.g. tinned copper strip.
  • Busbars (especially printed busbars) may be tapered or stepped, especially towards their ends. Consequently, references in this specification to busbar width are, unless the context indicates otherwise, references to the width of a part of a busbar (or busbar portion) which is of constant width. Local variations in width, especially a local widening, should be ignored. In the absence of any substantial busbar part of constant width, the reference should be taken to be to the average width of a part of a busbar (or busbar portion). Obviously, the widths of relatively wide and relatively narrow busbar portions are to be considered separately.
  • Busbars made from metal strip need not be as wide as those produced from conductive ink because metal strip materials have an inherently greater conductivity.
  • the heatable glazings of the present invention have uses in all areas where glazings are needed; they have found particular application in vehicles, especially road vehicles, although their use is not limited thereto. Applications also exist in the doors of freezer display cabinets, and in windows for ships, trains and aircraft, for example.
  • the glazing is associated with a power supply providing a supply voltage.
  • the busbars have a resistance value such that the busbars are suitable for heating the glazing on application of that voltage, more particularly for heating the glazing to a degree that provides for demisting or de-icing of the glazing.
  • FIG. 1 illustrates schematically a configuration of a heatable glazing according to the invention.
  • FIG. 1 One configuration of a heatable glazing is shown in FIG. 1 .
  • the glazing is a laminated windshield 4 for a vehicle, for example a car.
  • One heating element 6 extend across the windshield 4.
  • the resistive heating element 6 comprises metallic wires, preferably thin wires of tungsten, situated in the interior of the laminated windshield (next to the plastics interlayer) which heat the windshield 4 when current passes through them.
  • the metallic wires may be conductive strips printed on the windshield (typically on face 4 of the laminate, i.e. the surface facing the interior of the vehicle) using a conductive ink (e.g. silver particles in a glass frit).
  • first top busbar 10a which connects the resistive heating element of the "vision area" 6a to a second busbar 10b.
  • the second busbar 10b connected to the resistive heating element 6 is situated towards the bottom of the windshield 4 in the wiper rest areas 14.
  • the busbar 10b is connected to the ground (not shown) of the vehicle.
  • the heating element 6 extending across the windshield 4 is separated in first portion 6a delimited by the first 10a and the second busbars 10b, also called the "vision area" and a second portion 6b, the wiper rest area, delimited by the second 10b and the third 10c busbars.
  • the busbar 10c is electrically connected to the electrical converter DC/DC using contact element (not shown), for example thanks to an electrical connector.
  • the electrical converter DC/DC 11 is electrically connected to the car 13. Then the output voltage from the converter is applied to the busbar 10c. Thus, thanks to the use of the electrical converter, only one voltage is needed from the vehicle to powered the windshield 4. Furthermore, the converter is chosen to convert efficiently the voltage by minimizing the power dissipation.
  • the wires do not need to be cut into two parts: vision area and the wiper rest area.
  • the busbar 10b is directly applied by contact to the existing heating element 6 to delimited the wiper rest area (second portion).
  • the electrical converter DC/DC 11 to convert a DC voltage with a particular value to another DC voltage is disposed in a second portion of the pane in need of rapid or independent heating.
  • the electrical converter DC/DC 11 is placed on face 4 of the laminate, i.e. the surface facing the interior of the vehicle.
  • the electrical converter allows to convert a voltage of more or less 14V provided by a power source 13 to a smaller voltage of for example more or less 3V.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • General Induction Heating (AREA)

Claims (13)

  1. Vitrage pouvant être chauffé comprenant une vitre en matériau de vitrage avec une première partie (6a) délimitée par une première (10a) et une seconde (10b) barres conductrices dans lequel une tension V1 est appliquée et une seconde partie (6b) de la vitre nécessitant un chauffage rapide délimitée par des seconde et troisième barres conductrices dans lequel une tension V2 est appliquée, caractérisé en ce que la tension V1 est convertie en une tension V2 dans la seconde partie par un convertisseur électrique de courant continu à courant continu.
  2. Vitrage pouvant être chauffé selon la revendication 1, caractérisé en ce que le vitrage pouvant être chauffé est un vitrage stratifié.
  3. Vitrage pouvant être chauffé selon la revendication 2, caractérisé en ce que le convertisseur électrique de courant continu à courant continu est placé sur la face 4 du vitrage stratifié.
  4. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que la tension V2 est inférieure à la tension V1.
  5. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que la tension V2 est calculée par la formule suivante : V2 = V1 x (d2/d1) x α, dans laquelle V2 est la tension à appliquer dans la seconde partie, V1 est la tension appliquée dans la première partie, d1 la distance entre les première et seconde barres conductrices délimitant la première partie, d2 la distance entre les seconde et troisième barres conductrices délimitant la seconde partie, α est un facteur d'amplification pour appliquer plus de puissance dans la seconde partie.
  6. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que la seconde partie de la vitre se trouve dans la zone de repos de l'essuie-glace.
  7. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que le vitrage est un pare-brise.
  8. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, comprenant en outre au moins une autre barre conductrice.
  9. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que les barres conductrices et le convertisseur électrique de courant continu à courant continu peuvent être connectés électriquement à un élément chauffant à résistance (6) pour chauffer le vitrage.
  10. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément chauffant à résistance comprend un réseau de fils électriques fins s'étendant à travers la vitre.
  11. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément chauffant à résistance comprend un réseau de fils fins de tungstène s'étendant à travers la vitre.
  12. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que la vitre comprend un ensemble stratifié ayant au moins deux couches de verre et au moins une couche de plastique.
  13. Vitrage pouvant être chauffé selon l'une quelconque des revendications précédentes, caractérisé en ce que la vitre comprend du verre trempé.
EP16810419.8A 2016-01-08 2016-12-19 Vitrage chauffable Active EP3400753B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16150611.8A EP3190858A1 (fr) 2016-01-08 2016-01-08 Vitrage chauffable
PCT/EP2016/081646 WO2017118560A1 (fr) 2016-01-08 2016-12-19 Vitrage chauffant

Publications (2)

Publication Number Publication Date
EP3400753A1 EP3400753A1 (fr) 2018-11-14
EP3400753B1 true EP3400753B1 (fr) 2019-10-09

Family

ID=55070953

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16150611.8A Withdrawn EP3190858A1 (fr) 2016-01-08 2016-01-08 Vitrage chauffable
EP16810419.8A Active EP3400753B1 (fr) 2016-01-08 2016-12-19 Vitrage chauffable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16150611.8A Withdrawn EP3190858A1 (fr) 2016-01-08 2016-01-08 Vitrage chauffable

Country Status (4)

Country Link
US (1) US11076453B2 (fr)
EP (2) EP3190858A1 (fr)
EA (1) EA036264B1 (fr)
WO (1) WO2017118560A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019078258A1 (fr) 2017-10-20 2019-04-25 Ａｇｃ株式会社 Verre feuilleté pour véhicule
JP6943135B2 (ja) * 2017-10-20 2021-09-29 Ａｇｃ株式会社 車両用合わせガラス
KR102649643B1 (ko) * 2018-05-09 2024-03-21 쌩-고벵 글래스 프랑스 자동차 글레이징 안개 제거기
CN113170540A (zh) * 2018-10-10 2021-07-23 旭硝子欧洲玻璃公司 可加热的嵌装玻璃面板
GB202000442D0 (en) * 2020-01-13 2020-02-26 Pilkington Group Ltd Glazing, method of manufacturing said glazing and use of said glazing
WO2021251779A1 (fr) * 2020-06-11 2021-12-16 주식회사 아이테드 Fenêtre latérale de génération de chaleur pour véhicule, et appareil de commande pour commander une fenêtre de génération de chaleur pour véhicule
KR102628109B1 (ko) * 2020-06-11 2024-01-23 (주)아이테드 자동차 측면 발열 윈도우

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DE3226393A1 (de) 1982-07-15 1984-01-19 Flachglas AG, 8510 Fürth Beheizbare fahrzeugscheibe
US5543601A (en) * 1990-11-01 1996-08-06 Ppg Industries Inc. Multiple connection terminal assembly for an electrically heated transparency
US5434384A (en) 1991-07-22 1995-07-18 Ppg Industries, Inc. Coated windshield with special heating circuit for wiper arm storage area
US5182431A (en) 1991-12-18 1993-01-26 Ppg Industries, Inc. Electrically heated window
GB9708906D0 (en) 1997-05-01 1997-06-25 Triplex Safety Glass Co Electrically heated window
US8921739B2 (en) * 2002-02-11 2014-12-30 The Trustees Of Dartmouth College Systems and methods for windshield deicing
GB0918228D0 (en) * 2009-10-19 2009-12-02 Pilkington Group Ltd Heatable glazing
CN104682375A (zh) * 2015-03-24 2015-06-03 华为技术有限公司 数据中心的供电设备和供电方法

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Also Published As

Publication number Publication date
EP3190858A1 (fr) 2017-07-12
WO2017118560A1 (fr) 2017-07-13
EA036264B1 (ru) 2020-10-20
EA201891550A1 (ru) 2018-12-28
EP3400753A1 (fr) 2018-11-14
US11076453B2 (en) 2021-07-27
US20200170079A1 (en) 2020-05-28

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